Greptile vs Hostile Review

Greptile is an AI code review tool that builds a graph of your entire codebase to provide context-aware PR reviews. It learns from your team's review comments, enforces custom rules in plain English, and generates PR summaries with diagrams. $25M Series A, used by Brex, Substack, Scale AI.

Hostile Review is an adversarial code audit — 108 specialized AI agents that assume your code is broken and prove where. Not a PR reviewer — a full-codebase adversarial audit across 14 categories.

• Codebase graph — builds a detailed map of how everything connects, enabling context-aware review that understands impact across the entire project
• Learns from your team — reads every engineer's PR comments and tracks reactions to infer team standards. Gets smarter over time
• Custom rules in English — describe your coding standards in plain language or point to a markdown doc. No YAML, no regex
• PR summaries with diagrams — auto-generated change summaries with mermaid diagrams, file breakdowns, and confidence scores
• Speed impact — claims median time to merge dropped from 20 hours to 1.8 hours for their customers
• Self-hostable — deploy in your own AWS environment with custom LLM providers for data sovereignty
• Strong backing — $25M Series A from Benchmark at $180M valuation. Y Combinator alumni

• 108 agents vs 1 — each agent attacks from a different angle across 14 categories, then findings are deduplicated and consensus-ranked
• Full codebase audit, not just PRs — reviews everything, not just what changed. Catches issues in code that wasn't modified but interacts with what was
• 14 review categories — security, performance, architecture, compliance (GDPR/HIPAA/PCI), AI security, accessibility, i18n, cloud infrastructure
• Adversarial mindset — agents assume hostile intent. They're not reviewing code — they're attacking it
• Cross-file attack chains — finds vulnerabilities that span multiple files where the issue isn't in any single file or PR diff
• No per-seat pricing — a solo developer and a 200-person team pay the same rate per scan
• Compliance-grade depth — dedicated agents for GDPR, HIPAA, PCI-DSS, SOX, and SOC2

Greptile reviews your changes. Every PR gets smart, context-aware feedback that understands your codebase's architecture. It's the best version of "does this PR look good?" — fast, always-on, learns your team's preferences.

Hostile Review attacks your codebase. 108 agents don't care what changed in the last PR. They scan everything, assume it's broken, and prove where. Security, compliance, performance, architecture — the full adversarial audit.

One makes your PRs better. The other makes sure your codebase survives.